<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
</head>

<body>
    <!-- 创建容器 -->
    <div id="app"></div>
    <script type="text/babel">
        class App extends React.Component {
            state = {
                isHot: true
            }
            render(){
                const {isHot} = this.state
                if(isHot) {
                    return (
                        <div>
                            <h1>天气感知</h1>
                            <p>热热热热热热热</p>
                        </div>
                    )
                }else{
                    return (
                        <div>
                            <h1>天气感知</h1>
                            <p>冷冷冷冷冷冷冷冷</p>
                        </div>
                    )
                }
            }
            // render() {
            //     const { isHot } = this.state
            //     return (
            //         <div>
            //             <button onClick={this.changeWeather}>切换天气</button>
            //             {
            //                 isHot ? <div>
            //                     <h1>天气感知</h1>
            //                     <p>热热热热热热热</p>
            //                 </div>
            //                     :
            //                     <div>
            //                         <h1>天气感知</h1>
            //                         <p>冷冷冷冷冷冷冷冷</p>
            //                     </div>
            //             }
            //         </div>
            //     )
            // }

            changeWeather = () => {
                //获取相关数据
                const { isHot } = this.state
                //如果直接改变state的状态,则无法触发render重新渲染
                //通过setState方法设置想要的状态,一旦设置新的状态就会触发render,同时不会修改是他头疼的原始值
                this.setState({ isHot: !isHot })
            }
        }

        const root = ReactDOM.createRoot(document.getElementById("app"))
        root.render(<App />)

    </script>
</body>

</html>